Results expressed viability of the lactobacilli after the whole treatment. (A) Non-dehydrated (fresh culture) L. plantarum grown in MRS, WP and WP-GOS. (B) Dehydrated L. plantarum grown in MRS, WP (WP-GOS). Color bars indicate different pHs of the PBS solution. Black bars pH 2.9 ± 0.1, white bars pH 2.6 ± 0.1 and grey bars pH 2.3 ± 0.1. Different letters indicate significant differences (P < 0.05).